Here's a photo of the engine in the boat, September, 2015:

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Above -- see the alternator on this side of the block?

Below -- Some think the "one-wire" alternator is wired like this:

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But it's not. There are only two terminals on the new alternator -- one for a ground wire, and one to feed the battery. It's wired to the battery via a terminal on the solenoid.

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Instructions for a unit similar to will be found in this pdf file.